Read this excerpt from "Mars: Landscape of the Red
Planet."
What is the best description of the geology of Mars?
Abc
Mars's complexity goes well beyond its surface. Much of the
red planet was formed from volcanic material. The southern
part of Mars appears to have formed from volcanic activity.
This part of Mars has an ancient crust that is mainly mafic in
composition and contains high levels of iron and
magnesium. The lowlands in the northern parts of Mars are
younger and consist mostly of felsic rock, which is high in
potassium, silicon, and aluminum.
A. It is diverse, and different parts formed at different times.
B. It is like Earth, with volcanoes, ocean valleys, and thick
crust.
C. It is simple, containing the same type of material and
appearance everywhere.
D. It is like the moon, because it is made of rock inside and
on the surface.